TUNABLE FILTER FOR LTE BANDS

摘要

A tunable filter reduces the total number of filters used in TDD (Time-Division Duplex) communication circuitry. The communication circuitry may include a tunable filter and a first switch associated with the tunable filter. The tunable filter may include a tuning component and a filtering component. The tuning component may be located with the first switch on a first die. The filtering component may be located in a laminate underneath the first switch. Power amplifiers for amplifying transmission signals may be located on a second die, and the second die may be located on the laminate.

主权项

1. Communication circuitry comprising:
a tunable filter comprising a tuning component and a filtering component that collectively filter within a first band when tuned to the first band and filter within a second band when tuned to the second band; and a first switch configured to:
in a first mode, receive a first transmission signal and pass the first transmission signal to the tunable filter, andin a second mode, receive a first reception signal from the tunable filter and pass the first reception signal towards a transceiver, and wherein the tuning component and the first switch are located on a first die and the filtering component is not located on the first die.